Disassembling and reassembling a picture
The animation including this image starts from a picture of Coxeter's book (Complex regular polytopes) that we can see here on the background, disassembles this picture, and rebuilds it. The picture shows a projection of a 120-cell and in the animation we first see 5 segments going to build a pentagon, then 12 pentagons going to build a dodecahedron, then 120 dodecahedra going to build a 120-cell.
You can also see another video or an interactive animation about the 120-cell.
video di Gian Marco Todesco
The image belongs to the sections...:
120-cell (4D geometry)
4D geometry (Animations)